diff --git a/devel/py-serpent/Makefile b/devel/py-serpent/Makefile
index 54cc5ec74c9f..c8f480907389 100644
--- a/devel/py-serpent/Makefile
+++ b/devel/py-serpent/Makefile
@@ -1,18 +1,21 @@
 PORTNAME=	serpent
 DISTVERSION=	1.28
 CATEGORIES=	devel python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	rm@FreeBSD.org
 COMMENT=	Simple serialization library based on ast.literal_eval
 WWW=		https://pypi.org/project/serpent/
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
+DEPRECATED=	Used exclusively by now deprecated devel/py-pyro
+EXPIRATION_DATE=2025-03-21
+
 NO_ARCH=	yes
 USES=		python
 USE_PYTHON=	autoplist concurrent distutils
 
 .include <bsd.port.mk>